First attempt to tink demo

src/main.py

@@ -0,0 +1,28 @@
+"""
+FastAPI application entry point.
+"""
+
+from fastapi import FastAPI
+from fastapi.staticfiles import StaticFiles
+from starlette.middleware.sessions import SessionMiddleware
+
+from src.config import get_settings
+from src.routes.demo import router
+
+settings = get_settings()
+
+app = FastAPI(
+    title="Tink API Demo",
+    description="MoneyCapp × Tink — sales demo showing v2 API endpoints",
+    version="1.0.0",
+)
+
+app.add_middleware(
+    SessionMiddleware,
+    secret_key=settings.session_secret,
+    max_age=3600,
+)
+
+app.include_router(router)
+
+app.mount("/static", StaticFiles(directory="src/static"), name="static")